Pizza oven



FIG. 1 is a front elevational view of a pizza oven showing my new design, with controls being shown in broken line image for understanding use thereof and not forming a part of the claimed design;

FIG. 2 is a right-side elevational view of the pizza oven of FIG. 1;

FIG. 3 is a left-side elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom plan view thereof. 

The ornamental design for a pizza oven, as shown and described. 